Home / 12,003.69-18,005.79-3,119.36

Finding the Fourth Proportional to 12,003.69, 18,005.79 and 3,119.36

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Solution

The fourth proportional to 12,003.69, 18,005.79 and 3,119.36 is: 4,679.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,003.69 : 18,005.79 = 3,119.36 : x
  2. Step 2: Convert to fraction form
    12,003.69/18,005.79 = 3,119.36/x
  3. Step 3: Cross multiply
    12,003.69x = 18,005.79 × 3,119.36
  4. Step 4: Simplify right side
    12,003.69x = 56,166,564.05
  5. Step 5: Solve for x
    x = 56,166,564.05/12,003.69
  6. Step 6: Final answer
    x = 4,679.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.